Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords (such as equip) are activated abilities and will have colons in their reminder text.

12/7/2018

Faith’s Fetters doesn’t stop static abilities, triggered abilities, or mana abilities from working. A mana ability is an ability that produces mana, not an ability that costs mana.

12/7/2018

If the target permanent is an illegal target by the time Faith’s Fetters tries to resolve, the Aura spell doesn’t resolve. It won’t enter the battlefield, so its enters-the-battlefield ability won’t trigger.